Powered liftgate opening mechanism and control system

Details Powered liftgate opening mechanism and control system Powered liftgate opening mechanism and control system

B - Operations, Transporting

60

J

B60J 5/10 (2006.01) B62D 25/10 (2006.01) E05F 1/10 (2006.01) E05F 15/00 (2006.01) E05F 15/12 (2006.01)

Patent

CA 2445444

A power-operated system (32) for actuating the rear doors or liftgates (18) of motor vehicles (10) is disclosed. The system includes a strut assembly having two struts (30), each strut mounted on one side of the door between the door and the vehicle's door frame. One end of each strut (30) is connected to a powered moving arm (40). To open the door, the arms (40) move to change the angular orientation of the struts (30) such that they have a substantial mechanical advantage. In this position, the force provided by the struts (30) overcomes the weight bias of the door (18), thus opening the door. To close the door, the moving arms (30) change the angular orientation of the struts (30) such that the struts have a decreased mechanical advantage, reducing the force provided by the struts, and therefore allowing the door (18) to fall closed under its own weight bias. A control system for controlling the power- operated system (32) is also disclosed.

L'invention concerne un système motorisé de manoeuvre (32) pour l'actionnement d'une porte relevable, ou porte arrière (18), d'un véhicule à moteur (10). Le système comprend un ensemble support comportant deux bielles (30), chaque bielle étant montée sur un côté de la porte, entre la porte et l'encadrement de la porte du véhicule. Une extrémité de chaque bielle (30) est connectée à un bras moteur mobile (40). Pour ouvrir la porte, les bras (40) se déplacent et modifient l'orientation angulaire des bielles (30), de sorte qu'elles exercent une contrainte mécanique élevée. En cette position, la force fournie par les bielles (30) surmonte la sollicitation exercée par le poids de la porte (18), permettant ainsi l'ouverture de la porte. Pour la fermeture de la porte, les bras mobiles (30) changent l'orientation angulaire des bielles (30), de sorte que les bielles exercent un effet mécanique décroissant, réduisant la force fournie par les bielles, ce qui permet à la porte (18) de se fermer sous l'effet de son propre poids. L'invention concerne également un système de commande permettant de réguler le système motorisé de manoeuvre (32).

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